I basically do exactly this, but I am running the reverse proxy on my home computer: the VPS is literally just acting as a proxy, for which I use wireguard to tunnel the connection. So far it’s worked great, though initial setup was a pain.
But you see, memes are art!
Intel is almost flawless, I say as someone who uses an Intel A750. It does have a bug where putting load on the GPU causes a dramatic increase in latency for GPU compute tasks, but that’s mostly only important for VR. Flatscreen games work great.
I had My minecraft server scanned by at least 3 different bots, and I even had some friendly guy join my server that apparently found it using a bot he wrote. I’m now using a whitelist lol. One of the account names that scanned my server was "Fifth Column, which is a griefing group.
Ironically, I’m reading this from PostmarketOS, which has support for the echo dot 2, feature phones and some smartwatches, so it might be realistic to run on a vacum lol.
I know Gnome has an option to mark a connection as metered, no idea what exactly that does though.